Cast when Damage Taken Support

Support, Spell, Trigger
Icon: !
Level: (1-20)
Cooldown Time: 0.25 sec
Can Store 1 Use(s)Requires Level 38Each supported spell skill will track damage you take, and be triggered when the total damage taken reaches a threshold. Cannot support skills used by totems, traps, or mines. Vaal skills, channelling skills, and skills that reserve mana cannot be triggered.Trigger Supported Spells when you take a total of (528-3272) Damage
Supported Skills deal (-70-6)% more Damage
This Gem can only Support Skill Gems requiring Level (38-70) or lower
You cannot Cast Supported Triggerable Spells directlyThis is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.

Area level: 38

Normal

1x Orb of Alchemy

1x Scroll Fragment
Item class: Support Skill Gems
Metadata ID: Metadata/Items/Gems/SupportGemCastOnDamageTaken

Cast when Damage Taken is a support gem. It causes a linked spell to trigger when the player takes a certain amount of damage.

Skill functions and interactions

Trigger gem: Like all trigger gems, Cast when Damage Taken only "casts" spells. Attack gems such as Double Strike are not considered spells. Multiple spells can be linked to a single trigger gem, and will all be triggered if so. Multiple copies of Cast when Damage Taken will also function independently.

Damage counter and cooldown: Each linked spell gains an internal damage counter that tracks the total accumulated damage taken from hits, though not from damage over time or the Blood Magic passive^[1] (e.g. you cannot use Righteous FireRighteous FireSpell, AoE, Fire
Level: (1-20)
Cooldown Time: 0.30 sec
Can Store 1 Use(s)
Cast Time: Instant
Radius: 18Requires Level 16Engulfs you in magical fire that rapidly burns you and nearby enemies. Your spell damage is substantially increased while under this effect. The effect ends when you have 1 life remaining.Per 1% Quality:1Superior2Anomalous3Divergent1% increased Burning Damage0.5% increased Area of EffectBuff Grants 1% increased Spell DamageGrants (20-39)% more Spell Damage
Deals 20% of your Maximum Life as Base Fire Damage per second
You Burn for 90% of your Maximum Life per second as Fire Damage
Deals 20% of your Maximum Energy Shield as Base Fire Damage per second
You Burn for 70% of your Maximum Energy Shield per second as Fire Damage
Deals (35.8-1541.8) Base Fire Damage per second
+(0-5) to radiusPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket. to trigger Cast when Damage Taken). All damage counters will be reset to 0 upon entering a new area. When a linked spell is cast, it is put on cooldown for 250 ms and will not track damage during that time.

Multiple copies of the same gem share cooldowns, meaning that if two copies of the same spell are triggered within 250 ms of each other, the first will trigger and the second will fail to do so as it is on cooldown. This mostly prevents using multiple copies of the same spell with Cast when Damage Taken, though the use of Cast when Damage Taken gems of different levels can avoid cooldown overlap in some circumstances due to the differing amounts of damage required to trigger the spells.

The Cast when Damage Taken gem itself does not have its own counter or cooldown^[2].

Maximum level of supported skills: Cast when Damage Taken cannot support skills with a higher player level requirement than that of Cast when Damage Taken itself. Note that this restriction only applies to active skills; any level of other support gems may be used.

Trigger order: Trigger gems and their linked skills are cast in a certain order that depends both on which item it is equipped on and which socket the skills are in. If there are trigger gems in each equipped item, the order of operation will be:

Main hand ⇒ Amulet ⇒ Helm ⇒ Off hand ⇒ Body armour ⇒ Gloves ⇒ Boots

The linked sockets also follow a specific order, as follows:

1	⇒	2
		⇓
4	⇐	3
⇓
5	⇒	6

Damage effectiveness: The damage effectiveness increases with level, but so does the damage taken per cast; overall, the amount of damage that needs to be taken per damage effectiveness goes up at higher gem levels. The optimum is a level 2 gem, which requires 1442 damage taken per 100% damage effectiveness. In comparison, a level 20 gem requires 3057 damage taken per 100% damage effectiveness.

This does not, however, take into account the increase in damage from being able to use a higher level gem; for instance, a level 4 Bladefall gem deals an average of 91.5 damage, while a level 20 gem deals an average of 475. On a strict damage-in-per-damage-out basis, Cast when Damage Taken roughly triples in power between level 1 and level 20, depending on the skill used. Any flat added damage will affect this ratio -- the more damage added, the less effective it is to level up the Cast when Damage Taken gem.

Targeting: Targeted spells will cast towards the enemy that caused the last damage. Reflected damage is considered to come from the enemy originally damaged. If the damage was self-caused, it will target a random enemy (if there are no enemies, it will be cast at the player, if it is a projectile, it will be fired in a random direction) ^[3].

Totems: Cast when Damage Taken can't be used with totems.

Gem level progression

Level				Damage Threshold	less/more Damage	Maximum Level of Supported Skill Gems	Exp.	Total Exp.
1	38	40	27	528	70% less	38	0	0
2	40	41	29	583	66% less	40	388734	388734
3	42	43	30	661	62% less	42	477437	866171
4	44	45	31	725	58% less	44	583786	1449957
5	46	47	33	812	54% less	46	710359	2160316
6	48	49	34	897	50% less	48	1355511	3515827
7	50	51	35	1003	46% less	50	1138877	4654704
8	52	53	37	1107	42% less	52	1368233	6022937
9	54	55	38	1221	38% less	54	1638338	7661275
10	56	57	39	1354	34% less	56	1956648	9617923
11	58	58	41	1485	30% less	58	3655184	13273107
12	60	60	42	1635	26% less	60	3017327	16290434
13	62	62	43	1804	22% less	62	3576232	19866666
14	64	64	44	1980	18% less	64	4231667	24098333
15	65	65	45	2184	14% less	65	2395078	26493411
16	66	66	46	2394	10% less	66	8421063	34914474
17	67	67	46	2621	6% less	67	16159983	51074457
18	68	68	47	2874	2% less	68	41170367	92244824
19	69	69	48	3142	2% more	69	86794448	179039272
20	70	70	48	3272	6% more	70	157405063	336444335
21	72	72	50	3580	10% more	72	N/A	N/A
22	74	N/A	N/A	3950	14% more	74	N/A	N/A
23	76	N/A	N/A	4350	18% more	76	N/A	N/A
24	78	N/A	N/A	4780	22% more	78	N/A	N/A
25	80	N/A	N/A	5240	26% more	80	N/A	N/A
26	82	N/A	N/A	5730	30% more	82	N/A	N/A
27	84	N/A	N/A	6250	34% more	84	N/A	N/A
28	86	N/A	N/A	6800	38% more	86	N/A	N/A
29	88	N/A	N/A	7380	42% more	88	N/A	N/A
30	90	N/A	N/A	7990	46% more	90	N/A	N/A
31	91	N/A	N/A	8310	48% more	91	N/A	N/A
32	92	N/A	N/A	8630	50% more	92	N/A	N/A
33	93	N/A	N/A	8965	52% more	93	N/A	N/A
34	94	N/A	N/A	9300	54% more	94	N/A	N/A
35	95	N/A	N/A	9650	56% more	95	N/A	N/A
36	96	N/A	N/A	10000	58% more	96	N/A	N/A
37	97	N/A	N/A	10365	60% more	97	N/A	N/A
38	98	N/A	N/A	10730	62% more	98	N/A	N/A
39	99	N/A	N/A	11110	64% more	99	N/A	N/A
40	100	N/A	N/A	11490	66% more	100	N/A	N/A

Item acquisition

Upgrade paths

This item can be acquired through the following upgrade paths or vendor recipes:

Amount	Ingredient	General Notes	Type
9	Gift of the Gemling QueenGift of the Gemling Queen9Level 20 Support GemOur Lady Dialla, as a symbol of our progress, shines greater than all the gems.	random level 20 Support gem	Automatic
7	Dialla's SubjugationDialla's Subjugation7Superior Support Gem Quality: +23% CorruptedA symbol of beauty and innocence The gems corrupted her mind Malachai corrupted her gems All but a glimmer of greatness lost in madness	random corrupted superior Support gem with 23% quality	Automatic
8	Dying AnguishDying Anguish8Level 19 Gem Alternative Quality: +19%Moribund, he gazed upon the journey taken as blood trickled down his chin. His eye closed on the city ahead that he would never call home.	random level 19 gem with 19% alternative quality	Automatic
1	Gemcutter's IncubatorGemcutter's IncubatorAdds an incubated Quality Gem item to an equippable item Item drops after killing # monstersQuality GemRight click this item then left click an item to apply it. The Incubated item drops after killing a specific number of monsters.	random superior gem	Automatic
6	The FoxThe Fox6Level 20 Gem"Masters of wit, strength and cunning. To survive the harsh winters, you must be like the fox." - Ezomyte Proverb	random level 20 gem	Automatic
13	The CataclysmThe Cataclysm13Level 21 Spell Gem CorruptedThe mighty warriors traded in blows, the nimble archers in arrows, yet it was the brazen thaumaturgists who would bring catastrophe to all.	random corrupted level 21 Spell gem	Automatic
3	Gemcutter's PromiseGemcutter's Promise3Superior Gem Quality: +20%"I swore to use my position to help the people. What good is power when it just accumulates on the already-powerful?" - Erasmus, Imperial Gemcutter	random superior gem with 20% quality	Automatic
1	The VoidThe Void1Reach into the Void and claim your prize.	random divination card set exchange	Automatic

Vendor reward

This item can be bought at the listed NPC vendors, after completing the following quests:

Class →	Witch	Shadow	Ranger	Duelist	Marauder	Templar	Scion
Quest ↓	Witch	Shadow	Ranger	Duelist	Marauder	Templar	Scion
The Eternal Nightmare Act 4 Petarus and Vanja	✓
Fallen from Grace Act 6 Lilly Roth	✓

Strategy

Due to the large amount of damage taken needed per damage effectiveness and the rapid scaling of damage taken required per level, it is advisable to use spells for purposes other than damage that do not depend heavily on the active skill level. Possible choices include:

Frost WallFrost WallSpell, Duration, Cold
Level: (1-20)
Cost: (9-33) Mana
Cooldown Time: 3.00 sec
Can Store 3 Use(s)
Cast Time: 0.50 secCreates a wall of ice which holds back enemies. Targets under the wall are damaged and pushed back.Per 1% Quality:1Superior2Anomalous3Divergent1% increased Skill Effect Duration3% increased DamageFreezes enemies as though dealing 5% more DamageBase duration is (3-4.9) seconds
0.15 seconds between appearance of Wall sections
Wall will be (28-56) units long
Deals (8-462) to (12-693) Cold DamagePlace into an item socket of the right colour to gain this skill. Right click to remove from a socket. to block enemies.
Creeping FrostCreeping FrostSpell, Projectile, Duration, AoE, Cold
Level: (1-20)
Cost: (7-20) Mana
Soul Gain Prevention: 0 sec
Cast Time: 0.60 sec
Critical Strike Chance: 6.00%
Effectiveness of Added Damage: 80%
Projectile Speed: 844
Radius: 12Requires Level 12Fire an icy projectile that bursts on impact or when reaching the targeted area, dealing area damage and creating a chilling area that deals cold damage over time. This area will creep across the ground towards nearby enemies until its duration expires.Per 1% Quality:1Superior2Anomalous3Divergent4Phantasmal0.5% increased Area of Effect1% increased Skill Effect DurationFires an additional ProjectileChilling Area has 2% increased Movement SpeedBase duration is 5 seconds
Deals (11-383) to (16-572) Cold Damage
Can have up to 10 Chilling Areas
Deals (16.7-1391.2) Base Cold Damage per second
Modifiers to Spell Damage apply to this Skill's Damage Over Time effectPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket. to create ground ice.
Passive corpse disposal/minion buffing via Detonate DeadDetonate DeadSpell, AoE, Fire
Level: (1-20)
Cost: (5-20) Mana
Cast Time: 0.60 sec
Critical Strike Chance: 6.00%
Effectiveness of Added Damage: 160%
Radius: 22Targets a corpse, and deals spell damage to enemies around the corpse, as well as causing the corpse to explode, dealing fire damage. The explosion is not affected by modifiers to spell damage and cannot be reflected.Per 1% Quality:1Superior0.5% increased Cast SpeedExplosion deals base Fire Damage equal to 6% of the corpse's Maximum Life
Deals (15-798) to (22-1197) Fire Damage
+(0-4) to radiusPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket., Flesh OfferingFlesh OfferingMinion, Spell, Duration
Level: (1-20)
Cost: (16-33) Mana
Cast Time: 1.00 secRequires Level 12Consumes a corpse, which temporarily empowers your minions with swiftness. The skill consumes other nearby corpses, increasing the duration for each corpse consumed.Per 1% Quality:1Superior2Anomalous3Divergent0.5% increased Skill Effect DurationGrants Minions 0.02% of Damage Leeched as LifeGrants Minions 0.5% increased Attack SpeedBase duration is 5 seconds
Grants Minions (20-30)% increased Attack Speed
Grants Minions (20-29)% increased Movement Speed
Grants Minions (20-30)% increased Cast Speed
Additional 1 seconds Base Duration per extra corpse ConsumedPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket., or Bone OfferingBone OfferingMinion, Spell, Duration
Level: (1-20)
Cost: (16-33) Mana
Cast Time: 1.00 secRequires Level 12Consumes a corpse, granting all of your minions the power to block both attacks and spells. The skill consumes other nearby corpses, increasing the duration for each corpse consumed.Per 1% Quality:1Superior2Anomalous3DivergentGrants Minions 0.5% increased Cast Speed2% less Skill Effect Duration
Minions recover 5 Life when they BlockGrants Minions +0.1% Chance to Block Attack Damage
Grants Minions +0.1% Chance to Block Spell DamageBase duration is 5 seconds
Grants Minions +(25-35)% Chance to Block Attack Damage
Grants Minions +(25-34)% Chance to Block Spell Damage
Additional 1 seconds Base Duration per extra corpse Consumed
Minions recover (11-594) Life when they BlockPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket..
Lightning WarpLightning WarpSpell, AoE, Duration, Movement, Lightning, Travel
Level: (1-20)
Cost: (9-26) Mana
Soul Gain Prevention: 0 sec
Cast Time: 0.70 sec
Critical Strike Chance: 5.00%
Effectiveness of Added Damage: 60%
Radius: 16Requires Level 10Waits for a duration before teleporting to a targeted destination, with the duration based on the distance and your movement speed. When the teleport occurs, lightning damage is dealt to the area around both where the player was and where they teleported to. Casting again will queue up multiple teleportations to occur in sequence.Per 1% Quality:1Superior2Anomalous3Divergent4Phantasmal1% increased Cast Speed1% increased Area of Effect1% increased Duration
3% increased Damage0.5% less DurationDeals (1-37) to (19-707) Lightning Damage
(30-49)% reduced Duration
Can queue up to 50 uses
+(0-4) to radiusPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket. to escape melee range. (Could backfire.)
Curses. This can be a reliable way of automatically casting curses, at the cost of lower curse level.

Some supports also potentially combine well, especially with a persistent rapid-firing skill such as Ball LightningBall LightningSpell, Projectile, AoE, Lightning
Level: (1-20)
Cost: (12-23) Mana
Cast Time: 0.70 sec
Critical Strike Chance: 5.00%
Effectiveness of Added Damage: 50%
Projectile Speed: 400
Radius: 22Requires Level 28Fires a slow-moving projectile that periodically damages enemies in an area around it with bolts of lightning.Per 1% Quality:1Superior2Anomalous3Divergent1% increased Lightning Damage0.5% increased Cast SpeedProjectiles have 0.5% chance to be SuperchargedDeals (3-22) to (48-426) Lightning DamagePlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.:

Blind SupportBlind SupportSupport
Icon: x
Level: (1-20)
Cost & Reservation Multiplier: 110%Requires Level 8Supports any skill that hits enemies.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills have 1% increased Blinding durationSupported Skills have 0.5% chance to Blind enemies on hitSupported Skills have 2% increased Critical Strike Chance against Blinded EnemiesSupported Skills have 10% chance to Blind enemies on hit
Supported Skills have (0-38)% increased Blinding durationThis is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.
Chance to Flee SupportChance to Flee SupportSupport
Icon: z
Level: (1-20)Requires Level 8Supports any skill that hits enemies.Per 1% Quality:1Superior2AnomalousSupported Skills have 1% chance to Cause Monsters to FleeSupported Skills have 0.5% reduced Cast SpeedSupported Skills have (25-44)% chance to Cause Monsters to FleeThis is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.
Passive IIR culling via Culling Strike SupportCulling Strike SupportSupport
Icon: X
Level: (1-20)
Cost & Reservation Multiplier: 110%Requires Level 18Supports any skill that hits enemies. If enemies are left below 10% of maximum life after being hit by these skills, they will be killed.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills have 0-10% Increased DamageSupported Skills deal 3% increased Damage with Hits against Enemies that are on Low LifeRecover 0.1% of Life when Supported Skills Cull an EnemyKill Enemies that have 10% Life or lower when Hit by Supported Skills
Supported Skills deal (0-38)% increased DamageThis is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket., Item Rarity SupportItem Rarity SupportSupport
Icon: R
Level: (1-20)Requires Level 31Supports any skill that can kill enemies.Per 1% Quality:1Superior2Anomalous0.5% increased Rarity of Items Dropped by Enemies Slain from Supported SkillsSupported Skills have 0.1% chance for Coin Shower on Kill(40-59)% increased Rarity of Items Dropped by Enemies Slain from Supported SkillsThis is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket., and a skill that causes many hits.
Hextouch SupportHextouch SupportTrigger, Support, Hex
Icon: &
Level: (1-20)
Cost & Reservation Multiplier: 130%Requires Level 38Must support both a skill that hits enemies, and a hex curse skill to work. The hex will be applied when enemies are hit by the other skill. Cannot support totems, traps, or mines. Minions cannot apply hexes this way.Per 1% Quality:1Superior2Anomalous3Divergent0.5% increased Effect of Supported CursesSupported Skills deal 1% increased Damage with Hits and Ailments per Curse on Enemy0.5% reduced Effect of Supported Curses
Supported Skills have 2% increased Curse DurationSupported Skills apply supported Curses on Hit
Supported Skills have (50-12)% reduced Curse Duration
You cannot Cast Supported Curse SpellsThis is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket. (As of Version 1.2.2 CWDT will only trigger Ball Lightning in this example, Ball Lightning will then only trigger Curse On Hit if the supported curse is above the CWDT level threshold.)
Knockback SupportKnockback SupportSupport
Icon: k
Level: (1-20)Requires Level 8Supports any skill that hits enemies.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills have 0.5% chance to Knock Enemies Back on hitSupported Skills deal 0.5% increased DamageSupported Skills have 2% increased Knockback DistanceSupported Skills have (25-44)% chance to Knock Enemies Back on hit
Supported Skills have 50% increased Knockback DistanceThis is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.
Power Charge On Critical SupportPower Charge On Critical SupportSupport
Icon: P
Level: (1-20)
Cost & Reservation Multiplier: 120%Requires Level 18Supports any skill that hits enemies.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills have 1% increased Critical Strike ChanceSupported Skills have 1% chance to gain a Power Charge on Critical StrikeSupported Skills deal 0.1% increased Damage per Power ChargeSupported Skills have (35-54)% chance to gain a Power Charge on Critical Strike
Supported Skills deal 4% more Damage per Power ChargeThis is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.

Quick reference chart of commonly used spell gems and their maximum allowed level to be supported by each level of CWDT:

Level	Damage Threshold	Damage Modifier	Max level of spell gems	Immortal CallImmortal CallSpell, Duration, Guard Level: (1-20) Cost: (21-36) Mana Cooldown Time: 3.00 sec Can Store 1 Use(s) Soul Gain Prevention: 0 sec Cast Time: InstantRequires Level 34Take less Physical and Elemental Damage for a short time. Consumes up to 5 Endurance Charges to lengthen the buff and further lessen Physical Damage taken. Shares a cooldown with other Guard skills.Per 1% Quality:1Superior2Anomalous3Divergent1% increased Skill Effect Duration1% increased Cooldown Recovery Rate-0.1% less Physical Damage taken per Endurance Charge removed 0.1% less Elemental Damage taken per Endurance Charge removedBase duration is 1 seconds (25-34)% less Elemental Damage taken (25-35)% less Physical Damage taken 15% less Physical Damage taken per Endurance Charge removed 20% increased Buff Duration per Endurance Charge removed This Skill's Cooldown does not recover during its effectPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket. (Endurance charge bonus)	Molten ShellMolten ShellSpell, AoE, Duration, Fire, Physical, Guard Level: (1-20) Cost: (8-12) Mana Cooldown Time: 4.00 sec Can Store 1 Use(s) Soul Gain Prevention: 0 sec Cast Time: Instant Radius: 15Applies a buff that adds to your armour, and can take some of the damage from hits for you before being depleted. When the buff expires or is depleted, the skill deals reflected damage to enemies around you based on the total damage that was taken from the buff. Shares a cooldown with other Guard skills.Per 1% Quality:1Superior2Anomalous3Divergent1% increased Skill Effect DurationBuff can take additional Damage equal to 0.25% of your ArmourReflected Damage Penetrates 1% of Enemy Fire ResistanceBase duration is 3 seconds Buff grants +(50-858) to Armour 75% of Damage from Hits is taken from the Buff before your Life or Energy Shield Buff can take Damage equal to 10% of your Armour, up to a maximum of 5000 Reflects (100-3000)% of Damage taken from Buff as Fire Damage when Buff expires or is depleted This Skill's Cooldown does not recover during its effectPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket. (additional armour)	Creeping FrostCreeping FrostSpell, Projectile, Duration, AoE, Cold Level: (1-20) Cost: (7-20) Mana Soul Gain Prevention: 0 sec Cast Time: 0.60 sec Critical Strike Chance: 6.00% Effectiveness of Added Damage: 80% Projectile Speed: 844 Radius: 12Requires Level 12Fire an icy projectile that bursts on impact or when reaching the targeted area, dealing area damage and creating a chilling area that deals cold damage over time. This area will creep across the ground towards nearby enemies until its duration expires.Per 1% Quality:1Superior2Anomalous3Divergent4Phantasmal0.5% increased Area of Effect1% increased Skill Effect DurationFires an additional ProjectileChilling Area has 2% increased Movement SpeedBase duration is 5 seconds Deals (11-383) to (16-572) Cold Damage Can have up to 10 Chilling Areas Deals (16.7-1391.2) Base Cold Damage per second Modifiers to Spell Damage apply to this Skill's Damage Over Time effectPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.	EnfeebleEnfeebleSpell, AoE, Duration, Curse, Hex Level: (1-20) Cost: (16-33) Mana Cast Time: 0.50 secRequires Level 24Curses all targets in an area, reducing their accuracy and making them deal less damage.Per 1% Quality:1Superior2Anomalous3Divergent0.5% increased Effect of CurseCurse has 2% increased Doom gain rateCurse Skills have 0.5% increased Cast SpeedBase duration is (9-10.9) seconds Cursed enemies have (10-19)% reduced Accuracy Rating Cursed Normal or Magic enemies deal (21-30)% less Damage Cursed Rare or Unique enemies deal (10-15)% less Damage Curse gains 10 Doom per second if you Cast this Spell yourself +(0-10) to radiusPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.	Frost WallFrost WallSpell, Duration, Cold Level: (1-20) Cost: (9-33) Mana Cooldown Time: 3.00 sec Can Store 3 Use(s) Cast Time: 0.50 secCreates a wall of ice which holds back enemies. Targets under the wall are damaged and pushed back.Per 1% Quality:1Superior2Anomalous3Divergent1% increased Skill Effect Duration3% increased DamageFreezes enemies as though dealing 5% more DamageBase duration is (3-4.9) seconds 0.15 seconds between appearance of Wall sections Wall will be (28-56) units long Deals (8-462) to (12-693) Cold DamagePlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.	Tempest ShieldTempest ShieldSpell, Lightning, Chaining, Duration Level: (1-20) Cost: (7-16) Mana Cast Time: 0.25 sec Critical Strike Chance: 6.00% Effectiveness of Added Damage: 60%Requires Level 16Enchants your shield with the power of storms, which lashes out to deal arcing lightning damage to attackers when you block them. Blocking refreshes the duration of Tempest Shield.Per 1% Quality:1Superior2Anomalous3Divergent1% increased Lightning DamageChains +0.1 Times +0.05% Chance to Block Spell Damage while holding a ShieldDeals (24-284) to (36-426) Lightning Damage +3% Chance to Block Attack Damage while holding a Shield Chains +1 Times Base duration is 12 seconds +3% Chance to Block Spell Damage while holding a ShieldPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.	VortexVortexSpell, AoE, Cold, Duration, Nova Level: (1-20) Cost: (11-20) Mana Cooldown Time: 1.80 sec Can Store 1 Use(s) Soul Gain Prevention: 0 sec Cast Time: 0.75 sec Critical Strike Chance: 6.50%Requires Level 28An icy blast explodes around the caster, dealing cold damage to enemies, and leaving behind a whirling vortex which deals cold damage over time and chills enemies caught in it. If the caster targets near their Frostbolt projectiles, it will explode from a number of those projectiles instead, destroying them.Per 1% Quality:1Superior2Anomalous3Divergent4Phantasmal0.5% increased Area of Effect1% increased Cold Damage1% increased Cooldown Recovery Rate 1% less Skill Effect Duration2% increased Damage when Cast on FrostboltDeals (38-524) to (57-787) Cold Damage Base duration is 3 seconds Deals (106.5-1456.9) Base Cold Damage per second Can explode from up to 5 Frostbolt Projectiles 20% less Area of Effect when Cast on Frostbolt Modifiers to Spell Damage apply to this Skill's Damage Over Time effect (0-76)% increased Cooldown Recovery RatePlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.	Blood RageBlood RageSpell, Duration, Physical Level: (1-20) Cost: (12-29) Life Cooldown Time: 1.00 sec Can Store 1 Use(s) Cast Time: InstantRequires Level 16Adds a buff that deals Physical Damage over time, while increasing Attack Speed and Life Leech. Killing an enemy while this buff is active refreshes the buff duration, and can grant a Frenzy Charge.Per 1% Quality:1Superior2Anomalous3Divergent0.25% increased Attack SpeedBuff grants 0.1% chance to gain a Frenzy Charge when you Hit a Unique EnemyBuff grants 0.02% of Elemental Attack Damage leeched as Life(5-15)% increased Attack Speed 1.2% of Attack Physical Damage Leeched as Life You take 4% of your Maximum Life per second as Physical Damage You take 4% of your Maximum Energy Shield per second as Physical Damage 25% chance to gain a Frenzy Charge on Kill Base duration is (7-10.8) secondsPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.	Phase RunPhase RunSpell, Duration, Movement, Physical, Travel Level: (1-20) Cost: (8-13) Mana Cooldown Time: 4.00 sec Can Store 1 Use(s) Cast Time: InstantRequires Level 34Gain a buff that makes you faster, harder to detect, and grants Phasing, letting you pass through enemies. Performing any skill replaces this buff with one that boosts melee physical damage of skills you use yourself (it will not apply to your melee skills used by totems). Consumes Frenzy Charges to increase duration.Per 1% Quality:1Superior2Anomalous3Divergent0.5% increased Movement Speed1% increased Skill Effect Duration0.5% chance not to replace the Buff when you use a Skill(30-39)% increased Movement Speed (20-30)% more Melee Physical Damage 100% increased Stealth Base duration is 1.8 seconds Base secondary duration is 0.2 seconds 100% increased Skill Duration per Frenzy Charge removed Grants PhasingPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.	Temporal ChainsTemporal ChainsSpell, AoE, Duration, Curse, Hex Level: (1-20) Cost: (16-33) Mana Cast Time: 0.50 sec Radius: 22Requires Level 24Curses all enemies in an area, lowering their action speed and making other effects on them expire more slowly.Per 1% Quality:1Superior2Anomalous3Divergent0.5% increased Effect of CurseCurse has 2% increased Doom gain rate1% increased Curse DurationBase duration is (5-5.95) seconds Cursed Normal and Magic Enemies have (20-29)% less Action Speed Other effects on Cursed enemies expire 40% slower 50% less Effect of Curse against Players Cursed Rare and Unique Enemies have (10-14)% less Action Speed Curse gains 10 Doom per second if you Cast this Spell yourself +(0-10) to radiusPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.	Golem (any)
1	528	-70%	38	3 (106%)	10 (156)	4	5	10	7	4	7	3	5	3
2	583	-66%	40	4 (109%)	11 (196)	5	6	11	8	5	8	4	6	4
3	661	-62%	42	5 (112%)	11 (196)	6	7	11	8	6	8	5	7	5
4	725	-58%	44	6 (115%)	12 (245)	7	7	12	9	7	9	6	7	6
5	812	-54%	46	7 (118%)	12 (245)	8	8	12	10	8	10	7	8	7
6	897	-50%	48	8 (121%)	13 (304)	9	9	13	10	9	10	8	9	8
7	1003	-46%	50	9 (124%)	13 (304)	10	10	13	11	10	11	9	10	9
8	1107	-42%	52	10 (127%)	14 (376)	11	11	14	12	11	12	10	11	10
9	1221	-38%	54	11 (130%)	14 (376)	12	12	14	12	12	12	11	12	11
10	1354	-34%	56	12 (133%)	15 (440)	13	13	15	13	13	13	12	13	12
11	1485	-30%	58	13 (136%)	16 (515)	14	14	16	14	14	14	13	14	13
12	1635	-26%	60	14 (139%)	16 (515)	15	15	16	15	15	15	14	15	14
13	1804	-22%	62	15 (142%)	17 (600)	16	16	17	16	16	16	15	16	15
14	1980	-18%	64	16 (145%)	18 (698)	17	17	18	17	17	17	16	17	16
15	2184	-14%	65	16 (145%)	18 (698)	17	17	18	17	17	17	16	17	16
16	2394	-10%	66	17 (148%)	18 (698)	18	18	18	18	18	18	17	18	17
17	2621	-6%	67	17 (148%)	19 (812)	18	18	19	18	18	18	17	18	17
18	2874	-2%	68	18 (151%)	19 (812)	19	19	19	19	19	19	18	19	18
19	3142	+2%	69	19 (154%)	19 (812)	19	19	19	19	19	19	19	19	19
20	3272	+6%	70	20 (157%)	20 (943)	20	20	20	20	20	20	20	20	20
21	3580	+10%	72	21 (160%)	21 (1040)	21	21	21	21	21	21	21	21	21
22	3950	+14%	74	22 (163%)	22 (1148)	22	22	22	22	22	22	22	22	22
23	4350	+18%	76	23 (166%)	23 (1265)	23	23	23	23	23	23	23	23	23

Cats when Damage Taken

Cats when Damage Taken was a trigger gem available only on April 1st 2015 as an April Fool's joke.^[4] Like Cast when Damage Taken, it caused a linked spell to activate when the player accumulated damage taken, but besides casting the spell, it also summoned black cats. Other properties were identical to the Cast when Damage Taken skill.

Version history

Version	Changes
2.0.0	Enduring Cry is now a Warcry instead of a spell, therefore it can't be cast anymore.
1.3.1g	Fixed a bug with the trigger gems that cause spells to automatically cats on various conditions.
1.3.1	Spells triggered by Cast on Damage Taken have had their damage reduced by 25%.
1.3.0	Trigger gems are now classified as Trigger.
1.2.2	Gems may now only be supported by a single trigger gem, gems supported by multiple trigger gems will be disabled.
1.0.1	The level requirement of gems augmented by Cast on Damage Taken may not exceed the level requirement of the Cast on Damage Taken gem.
1.0.0f	Cooldown of 250ms added.
1.0.0	Cast when Damage Taken has been added to the game.

References

↑ Mark_GGG (9 October 2013). "Path of Exile Forum". Retrieved 2 July 2015.
↑ Mark_GGG (May 20, 2014). "Path of Exile Forum".
↑ Some experimentation with Heartbound Loop
↑ Chris (April 1, 2015). "Incident Report for April 1 Catastrophe". Retrieved April 1, 2015.

[1] Mark_GGG (9 October 2013). "Path of Exile Forum". Retrieved 2 July 2015.

[2] Mark_GGG (May 20, 2014). "Path of Exile Forum".

[3] Some experimentation with Heartbound Loop

[4] Chris (April 1, 2015). "Incident Report for April 1 Catastrophe". Retrieved April 1, 2015.

[1]

[2]

[3]

[4]

v t e Support gems

Dexterity gems	Added Cold Damage Support Additional Accuracy Support Advanced Traps Support Arrow Nova Support Awakened Added Cold Damage Support Awakened Arrow Nova Support Awakened Cast On Critical Strike Support Awakened Chain Support Awakened Cold Penetration Support Awakened Deadly Ailments Support Awakened Fork Support Awakened Greater Multiple Projectiles Support Awakened Swift Affliction Support Awakened Vicious Projectiles Support Awakened Void Manipulation Support Barrage Support Blind Support Block Chance Reduction Support Cast On Critical Strike Support Cast on Death Support Chain Support Chance to Flee Support Chance to Poison Support Charged Traps Support Close Combat Support Cluster Traps Support Cold Penetration Support Critical Strike Affliction Support Culling Strike Support Deadly Ailments Support Enhance Support Faster Attacks Support Faster Projectiles Support Fork Support Greater Multiple Projectiles Support Greater Volley Support Hypothermia Support Ice Bite Support Impale Support Lesser Multiple Projectiles Support Mana Leech Support File:Mark on Hit Support inventory icon.png Mark on Hit SupportFile:Mark on Hit Support inventory icon.png Mirage Archer Support Multiple Traps Support Nightblade Support Onslaught Support Pierce Support Point Blank Support Second Wind Support Slower Projectiles Support Swift Affliction Support Swift Assembly Support Trap and Mine Damage Support Trap Support Vicious Projectiles Support Vile Toxins Support Void Manipulation Support Volley Support Withering Touch Support

Intelligence gems	Added Chaos Damage Support Added Lightning Damage Support Arcane Surge Support Archmage Support Awakened Added Chaos Damage Support Awakened Added Lightning Damage Support Awakened Blasphemy Support Awakened Cast While Channelling Support Awakened Controlled Destruction Support Awakened Elemental Focus Support Awakened Hextouch Support Awakened Increased Area Of Effect Support Awakened Lightning Penetration Support Awakened Minion Damage Support Awakened Spell Cascade Support Awakened Spell Echo Support Awakened Unbound Ailments Support Awakened Unleash Support Blasphemy Support Blastchain Mine Support Bonechill Support Cast when Stunned Support Cast while Channelling Support Charged Mines Support Combustion Support Concentrated Effect Support Controlled Destruction Support Decay Support Efficacy Support Elemental Army Support Elemental Focus Support Elemental Penetration Support Elemental Proliferation Support Energy Leech Support Enlighten Support Faster Casting Support Feeding Frenzy Support Hextouch Support High-Impact Mine Support Ignite Proliferation Support Immolate Support Impending Doom Support Increased Area of Effect Support Increased Critical Damage Support Increased Critical Strikes Support Infused Channelling Support Innervate Support Intensify Support Item Rarity Support Lightning Penetration Support Meat Shield Support Minefield Support Minion Damage Support Minion Life Support Minion Speed Support Physical to Lightning Support Pinpoint Support Power Charge On Critical Support Predator Support Spell Cascade Support Spell Echo Support Summon Phantasm Support Swiftbrand Support Trinity Support Unbound Ailments Support Unleash Support

Strength gems	Added Fire Damage Support Ancestral Call Support Arrogance Support Awakened Added Fire Damage Support Awakened Ancestral Call Support Awakened Brutality Support Awakened Burning Damage Support Awakened Elemental Damage With Attacks Support Awakened Fire Penetration Support Awakened Generosity Support Awakened Melee Physical Damage Support Awakened Melee Splash Support Awakened Multistrike Support Ballista Totem Support Bloodlust Support Bloodthirst Support Brutality Support Burning Damage Support Cast on Melee Kill Support Cast when Damage Taken Support Chance to Bleed Support Cold to Fire Support Cruelty Support Damage on Full Life Support Elemental Damage with Attacks Support Empower Support Endurance Charge on Melee Stun Support Fire Penetration Support Fist of War Support Fortify Support Generosity Support Increased Duration Support Inspiration Support Iron Grip Support Iron Will Support Item Quantity Support Knockback Support Less Duration Support Life Gain on Hit Support Life Leech Support Lifetap Support Maim Support Melee Physical Damage Support Melee Splash Support Multiple Totems Support Multistrike Support Pulverise Support Rage Support Ruthless Support Shockwave Support Spell Totem Support Stun Support Urgent Orders Support

Other support gems	Awakened support skill gem

Related items	Active skill gem Vaal skill gem

Path of Exile Wiki

Cast when Damage Taken Support

Contents

Skill functions and interactions

Gem level progression

Item acquisition

Upgrade paths

Vendor reward

Strategy

Cats when Damage Taken

Version history

See also

References

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